Streetability of big stalls

[FIVE-OH]

It took a cai, bbr email tune, 4.10 gears, o/r x, and a boss mani for my friend to get a 12.5. Stock stall. 2.1 60'.

DA was 4500' though. Lol


Sent from my iPhone using Tapatwat

Well that DA is bad, he lost a few tenths right there easy. He would be quicker with the stock 3:15's though, 4:10's with his mods are a no no. I ran that ET with just a Mike Rousch tune and GT500 axleback/resonator deletes in decent (500) DA, on street tires with no weight reduction (even had the spare in the trunk).

 

[Riptide]

Whats the issue with 4.10? Hes still NA. Its an auto car fyi


Sent from my iPhone using Tapatwat

 

[FIVE-OH]

Whats the issue with 4.10? Hes still NA. Its an auto car fyi


Sent from my iPhone using Tapatwat

4:10s with the auto are too much IMO. Makes first gear too short (and useless on the street). Plus it shifts into 4th gear at the drag strip.

 

[Unreal]

Yah, 3.73s slow me down. I ran 12.9@113mph up at 7000ft DA. Came down here to 1500-2000DA and went 12.2@114 with 3.73s. The shift to 4th kills times.

 

[Riptide]

Better torque multiplication vs the shifts. A tuned auto shouldnt lose that much off one shift you would think.


Sent from my iPhone using Tapatwat

 

[FIVE-OH]

Better torque multiplication vs the shifts. A tuned auto shouldnt lose that much off one shift you would think.


Sent from my iPhone using Tapatwat

There is a reason why all the quickest auto 5.0's are running 3:31's or 3:15's though. Search around, there has been threads about this before. Remember the first gear ratio in the 6R80 is pretty aggressive...

 

[Unreal]

Car will be quicker trapping in 3rd than shifting to 4th around 1000ft and not getting to the good part of the power band. Do whatever you want though, but all the fast autos are running stock or 3.31 gears.

I'm doing 3.31 which aren't ideal for a 26" tire and may cost me a tenth but I'll swap to a 28" tire once my ET streets are dead then the 28" will be perfect.

So plan for now is Tru Trac with 3.31 gears, Circle D 4C, DSS Aluminum shaft, and have Mike retune it.

 

[Mike Rousch]

Car will be quicker trapping in 3rd than shifting to 4th around 1000ft and not getting to the good part of the power band. Do whatever you want though, but all the fast autos are running stock or 3.31 gears.

I'm doing 3.31 which aren't ideal for a 26" tire and may cost me a tenth but I'll swap to a 28" tire once my ET streets are dead then the 28" will be perfect.

So plan for now is Tru Trac with 3.31 gears, Circle D 4C, DSS Aluminum shaft, and have Mike retune it.

Once you get the 28s on there that is going to be a great combo

 

[wbt]

Car will be quicker trapping in 3rd than shifting to 4th around 1000ft and not getting to the good part of the power band. Do whatever you want though, but all the fast autos are running stock or 3.31 gears.

I'm doing 3.31 which aren't ideal for a 26" tire and may cost me a tenth but I'll swap to a 28" tire once my ET streets are dead then the 28" will be perfect.

So plan for now is Tru Trac with 3.31 gears, Circle D 4C, DSS Aluminum shaft, and have Mike retune it.

Once you get the 28s on there that is going to be a great combo

x2. Very solid combo.

 

[Unreal]

Once I get the stall from Mike it will be even better. Gears/diff on order.

Mike, can you send me a tune for the 3.31 since I'll need to load that in. Same as now just updated for 3.31s.

 

[quiksilver15]

I wanted something bigger than the 5C, so I went with a Circle-D 4E built to flash to 4800-5000 rpm's. With the factory 3.15 gears, and just a tune, 1-pc d/s, and drag radials, it runs 12.0's in the 1/4 mile. Car is 100% stock otherwise. Oh yeah, and it's my daily driver, too. Very streetable and no regrets. Best mod after forced induction!

What exhaust set up you have?

Probably stock.

 

[Mike Rousch]

Once I get the stall from Mike it will be even better. Gears/diff on order.

Mike, can you send me a tune for the 3.31 since I'll need to load that in. Same as now just updated for 3.31s.

Of course! I will have it out to you first thing in the morning!

 

[FIVE-OH]

Probably stock.

Maybe, but inquiring minds need to know. Many people (including ones in this thread LOL) have left out mods when describing ET's.

 

[Riptide]

I'm not sure 4.10s are that bad with an automatic if you're naturally aspirated. Don't believe me look at the top cars on this very site's ranking list. There are several 3.73 and 4.10 automatics in the upper portion of that list.

 

[FIVE-OH]

I'm not sure 4.10s are that bad with an automatic if you're naturally aspirated. Don't believe me look at the top cars on this very site's ranking list. There are several 3.73 and 4.10 automatics in the upper portion of that list.

That 4V N/A list is pretty old, many guys have reverted back. I bet they would all be quicker and faster with 3:31's or 3:15's unless they are running an odd tire height. As far as I know the top five autos all run 3:31's.

 

[Riptide]

Not sure if serious.

 

[Mishri]

4.10s are the best, nobody can compete.

from this thread:

http://www.s197forum.com/forum/showpost.php?p=1385376&postcount=6

should put us in perfect RPM for finishing.

 

[FIVE-OH]

Car will be quicker trapping in 3rd than shifting to 4th around 1000ft and not getting to the good part of the power band. Do whatever you want though, but all the fast autos are running stock or 3.31 gears.

^ This.

 

[Mishri]

In that thread you can see that guy gave an update, he went to 3.31 from 4.10s and lost ET and mph, then went back to 4.10s. so I guess there is evidence 4.10s are better.. But like wbt speculated in that thread, it likely depends on the setup, and his stall probably helps me out a lot.

 

[wbt]

4.10s are the best, nobody can compete.

from this thread:

http://www.s197forum.com/forum/showpost.php?p=1385376&postcount=6

should put us in perfect RPM for finishing.

Actually a 4.10 is the wrong gear unless you are running the stock intake manifold and a 28" tire.

The proper rear gear ratios break down like:

Stock intake manifold, 28" tire:
3.15 - cross at the top of third
4.10 - cross at the top of fourth

Boss or CJ intake, 28" tire:
3.31 - cross at the top of third
4.30 - cross at the top of fourth

The reason less gear is more for the auto is the 4.17 first gear. Do the math on what gear ratio is equivalent running a C4 vs. even a 3.15 gear with the 6R80. Depending on the planetary ratio it is in the 5.xx range.

So couple the truck like first gear in the 6R80 with a 4.10 or 4.30 and now you are going to start having traction issues and have less consistency especially on a marginal prep. Add that extra shift going down track and it becomes another negative for more gear.

I have seen it first hand, less is more.